.promotion-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  border-radius: inherit;
}
.promotion-picker {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: white;
  padding: 10px;
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
}
.promotion-piece {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: 8px;
  background: #fafafa;
  transition: all 0.15s ease;
}
.promotion-piece:hover {
  background: #eff6ff;
  border-color: #3b82f6;
  transform: scale(1.08);
}
.promotion-piece:active {
  transform: scale(0.95);
}